Great information! I used to shoot the 85 grain TSX from the .243Win and the .240Wby with great results and wondered how the 80 grainer would compare. I killed my biggest MN buck with the 85 out of a Weatherby Ultra Lightweight in .240. I made a poor decision on placement, he was quartering hard away at 185 yards and my brain saw crosshairs in the crease and my finger squeezed. Bullet entered top of the heart high right in the crease and angled to the top of the humorous on the off side and destroyed it. He was a 300 pound 10 pointer and he 3 legged it 15 yards before I sent the second one. He had turned to nearly broadside and the 2nd one went through the top of the heart after a rib and left a tennis ball sized exit and there he fell right there in the bean stubble. I was very impressed with that bullet.